[cctalk] Re: Z80 vs other microprocessors of the time.
> On Apr 29, 2024, at 1:59 AM, Steve Lewis via cctalk > wrote: > > After learning more about the PALM processor in the IBM 5100, it has a > similarity to the 6502 in that the first 128 bytes of RAM is a "register > file." All its registers (R0 to R15, across 4 interrupt "layers") occupy > those first addresses. In addition, they are physically on the processor > itself (not in actual RAM). That sort of thing goes way back. There is of course the PDP-6 and PDP-10 where the 16 registers alias to the low 16 memory locations. And the notion of registers per interrupt level also appears in the Philips PR-8000, a 24 bit minicomputer from the 1960s aimed (among other things) at industrial control applications. That sort of architecture makes interrupt handling very efficient since it eliminates state saving. Unfortunately there's very little documentation of that machine anywhere; the little I found is on Bitsavers. paul
[cctalk] Re: Altair 8800 50th birthday...
On Saturday, April 27th, 2024 at 07:14, Bill Gunshannon via cctalk wrote: > > Magazine cover january, and into 1975 the revolution. So I'd say all > > I had that magazine. Wish I hadn't thrown it away oh so many > years ago. This one? https://archive.org/details/197511PopularElectronics The Doctor [412/724/301/703/415/510] WWW: https://drwho.virtadpt.net/ Don't be mean. You don't have to be mean.
[cctalk] Re: Altair 8800 50th birthday...
Me too !Also another Issue where computer company publicized their private researched architecture in the ad on the back page in simplified form. Woops !!! Original message From: The Doctor via cctalk Date: 4/29/24 11:12 AM (GMT-06:00) To: "General Discussion: On-Topic and Off-Topic Posts" Cc: The Doctor Subject: [cctalk] Re: Altair 8800 50th birthday... On Saturday, April 27th, 2024 at 07:14, Bill Gunshannon via cctalk wrote:> > Magazine cover january, and into 1975 the revolution. So I'd say all> > I had that magazine. Wish I hadn't thrown it away oh so many> years ago.This one?https://archive.org/details/197511PopularElectronicsThe Doctor [412/724/301/703/415/510]WWW: https://drwho.virtadpt.net/Don't be mean. You don't have to be mean.
[cctalk] Re: Altair 8800 50th birthday...
On Sat, Apr 27, 2024 at 11:53 AM Bill Degnan via cctalk < cctalk@classiccmp.org> wrote: > Magazine cover january, and into 1975 the revolution. So I'd say all > year. Not one specific date > Bill > > On Sat, Apr 27, 2024, 12:05 AM Fred Cisin via cctalk < > cctalk@classiccmp.org> > wrote: > > > On Fri, 26 Apr 2024, Sellam Abraham via cctalk wrote: > > > It really is a momentous event, and should be properly honored and > > > celebrated. Wow, half a century. > > > Thanks for bringing this up. > > > > Is this half a century from when they said, "Hey, you know what would be > > neat to build?" > > or from when they started designing? > > or got a preliminary design done? > > built a prototype? > > announced it? > > started taking orders? > > started filling orders? > > > > Fred > In my experience, talking with many older computer people during the earlier years that I began collecting in earnest (late 90s, early 00s), their introduction to computing came by way of buying and building an Altair 8800 kit based on the cover of the January 1975 issue of Popular Electronics, or at least being captivated by it. I call it the Big Bang of the Microcomputer Era. Sellam
[cctalk] Re: PCs in home vs businesses (70s/80s)
On Sat, Apr 27, 2024 at 1:03 PM Joshua Rice via cctalk < cctalk@classiccmp.org> wrote: > I'm a youngster when it comes to this hobby, being manufactured myself > in the early years of the 90's. As such i cannot really quote from my ... > > Thanks for reading my TED talk, > > Josh Rice > Nice write-up. Sellam
[cctalk] Re: Altair 8800 50th birthday...
On Mon, Apr 29, 2024, 2:08 PM The Doctor via cctalk wrote: > > On Saturday, April 27th, 2024 at 07:14, Bill Gunshannon via cctalk < > cctalk@classiccmp.org> wrote: > > > > Magazine cover january, and into 1975 the revolution. So I'd say all > > > > I had that magazine. Wish I hadn't thrown it away oh so many > > years ago. > > This one? > > https://archive.org/details/197511PopularElectronics > > The Doctor [412/724/301/703/415/510] > WWW: https://drwho.virtadpt.net/ > Don't be mean. You don't have to be mean > https://vintagecomputer.net/altair-poptronics.cfm (Jan and Feb) >
